Lathe-turret stop.



N0. 699,3I0. Patented May 6, I902. BQM. W. HANSON. LATHE TURRET STOP.

(Application filed Dec. 18, 1901. (No Model.) 3 Sheets-Sheet l.

Witnesses: W m HWMM Inventor NW1" 3" W go WLS. R) Attprney m: Nonms PETERS co, PNOYOJJYHO WASHINGTON n c No. 699,3"). Patented May 6, I902 B. M. W. HANSUN.

LATHE TURBET STOP. (Application filed. Dec. 18, 1901,, (IloJflodeL) 3Sheets-Sheet 2.

m.w. 1W W'tnesses: Inventor 1 I I m WM Wl-S. Bddwl.

Attorney N0. 699,3"). Patented May 6, I902.

B. M. W. HANSON.

LATHE TURRET STOP. A licatio n filed Dec. 18, 1901.

(No Model.) 3 Sheets$heet 3.

Q s U 'tnesses:

llNTTno STATES ATENT OFFICE.

BENGT M. \V. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE PRATT d: lVHITNEY COMPANY, OF HARTFORD, CONNECTICUT.

LATHE-TURRET STOP.

SPECIFICATION forming part of Letters Patent No. 699,310, dated May 6, 1902. Application filed December 18,1901. Serial No. 86,370. (No model.)

To (6 2072 0172, it may concern: the worm-wheel; 14, an arm projecting from Be it known that I, BENGT lWI. WV. HANSON, the drop-box; 15, a sliding latch-rod disposed a citizen of Sweden, residing at Hartford, across the turret-slide and connected at its Hartford county, Connecticut, (postoffice adrear end with arm 14; 16, a spring connected 5 dress care Pratt & lVhitney Company, Hartwith the latch-rod and tending to .push it forford,Connecticut,) haveinvented certain new ward to position corresponding with the disand useful Improvements in Lathe Turret engaged condition of the worm, and 17 a knob Stops, of which the followingisaspecification. or handle on the front end of the latch-rod.

This invention pertains to improvements Noneof the parts thus far referred to call To in that class of feed-stops for the turrets of for special description, as they are of usual turret-lathes in which there are as many stops character in disengageable feed devices. If as there are turret-tools, each individual stop the latch-rod be pushed and held rearwardly, being appropriated to aparticular turret-tool it will rock the drop box and elevate the and the selection of the active stop being conworm-gear and cause the rotation of feed- I5 trolled by the angular adjustment of the turshaft 8 to result in a forward advance of the ret, so that whenever a given turret-tool is in turret. Ifthe latch-rod be released, then the activeposition thenitsindividualstopisin acweight of the drop-box and Worm, aided by tive condition. the action of the spring on the latch-rod, will The invention will be readily understood cause the worm to drop out of engagement 7o 20 from the following description, taken in conwith the worm-wheel, whereuponthe powernection with the accompanying drawings, in feeding motion will cease and leave the turwhichret-slide free to be moved by hand through Figure 1 is a front elevation of the pertithe agency of capstan-wheel 7. By means of nent portions of a turret-lathe illustrating my devices now to be described the power-feed 25 invention; Fig. 2, a plan of the same; Fig. will be automatically thrown out of action 8-, an end elevation of the same; Fig. 4, a front when the advancing turret-slide has reached elevation of the main sliding block, shown a predetermined point, and when the turret partly in vertical longitudinal section; Fig. is turned to bring another tool into action 5, a vertical transverse section of this block, then another and perhaps difierently-set stop 0 and Fig. 6 a plan of the latch-bar and latch. becomes active to throw out the power-feed, In the drawings, 1 indicates the lathe-bed; there being a separate stop appropriated to 2, the turret-slide; 3, the turret; 4, the feedeach turret-tool. rack fast upon the bed; 5, a cross-shaft jour- Proceeding with the drawings, 18 indicates naled in the turret-slide; 6, a pinion fast on a longitudinal guideway upon the turret- 3 5 this shaft and engaging rack 1 7, a capstanslide, illustrated as dovetailed in cross-secwheel on the front end of cross-shaft 5; S, a tion; .19, a block having a limited sliding mosplined feed-shaft mounted parallel with the tion upon this guideway; 20, a lug projecting bed, at its back, and designed to transmit the from the turret-slide at the right-hand end of power feed motion to the turretslide; 9, block .19 and serving to limit the sliding mo- 0 4o brackets projecting from the rear of the turtion-ot' that block to the right; 21, a springrot-slide and furnishing bearings for feedplunger in the right-handend of block 19, shaft 8; 10, a drop-box supported by brackadapted to engage lug 20 and tend to hold the ets 9 and having angular motion on the axis block out of rigid unyielding contact with the of shaft 8; 11, a worm-wheel fast on the rear lug; 22, a stop upon the turret-slide at the 5 5 end of cross-shaft 5; 12, apairofintermemberleft-hand end of block 19, serving to limit the ing gears in the drop-box, one splined on feedsliding motion of the block to the left, the shaft 8 and the other fast on a worm-shaft block thus being capable of only slight endjournaled in the drop-box under the wormwise motion upon its guideway; 23, a forgear; 13,,the feed-worm on the worm-shaft and wardly-presenting shoulder near the forward I00 50 adapted by the angular movement of the end of latch-rod 15, which latch-rod passes drop-box to engage with or disengage from freely through a slotin block 1 the shoulder in question being located to the rear of the front face of the block; 24, a latch sliding horizontally in a recess in block 19, this latch being disposed at the right of the latch-rod and havingits left-hand end formed to engage in front of shoulder 23 on the latch-rod when the latch-rod is pushed rearwardly, corresponding with engaged position of the feedworm; 25, a spring-plunger in the right-hand end of latch 24, serving to urge the latch to the left into engagement with the shoulder of the latch-rod, but permitting the latch to be shifted to the right, so as to disengage from the shoulder of the rod, and 26 a handle projecting forwardly from the latch through a slot in the face of block 19.

The slot in the face of block 19 for the passage of handle 26 has its end wall engaging or nearly engaging the left of the handle when the latch is in engagement with the latch-rod. As thus far described block 19 may be assumed as a fixture bearing against stop 22 and held there by spring-plunger 21. If latch-rod 15 be pushed to the rear, thus engaging the feed worm with the wormwheel, latch 24: will engage in front of the shoulder of the latch-rod, thus locking the power-feed in action. By pressing handle 26 to the right the latch is disengaged and the worm drops out of action. Thus the power-feed may be put into or out of action at any time by hand operations.

Proceeding with the drawings, 27 indicates a bracket supported by the lathe-bed at its front and arranged, preferably, for adjustment to difierent positions along the length of the bed, the illustration showing the front of the bed as being grooved for the reception of this horizontally-sliding bracket,which is bolted to the bed; 28,the bolt securing bracket 27 to the bed and adapted to engage selective holes in the bed, thus providing for the longitudinal adjustment of the bracket; 29, a series of stop-rods supported in bracket 27 parallel with each other and the bed, each of these rods presenting an end to the right of the bracket at a distance therefrom depend cut on adjustment, the rods being capable of independent longitudinal adjustment in the bracket, there being as many of these rods as there are tool-receivers in the turret, (sixin the presentinstanceg) 30, set-screws in bracket 27, serving to secure the stop-rods 29 therein; 31, a'rock-shaft journaled in the front of the turret-slide, the stop-rods 29 being arranged in an arc of which rock-shaft 31 is the center; 32, a finger splined on rockshaft 31 and bearing to the right against the left end of block 19, the free end of this finger being adapted to sweep to a selective position in line with any given one of the stoprods 29, the illustration showing the finger as in line with the innermost one of these stoprods, the hub of the finger in which rockshaft 31 is splined being journaled in a bearing in block 19, so that the finger and block move horizontally in company when the block slides on the turret-slide between its stops 20 and 22; 33, awing projectingoutwardly from block 19 and bearing against the right-hand face of finger 32, so that the finger is well backed up by the block near the free extremity of the finger; 34, a spring connected with rock-shaft 3i and tending to turn that shaft and swing the finger outwardly; 35, an arm fast on the rock-shat t and projecting into a position near the base of the turret; 36, a

cam carried by the turret, the contour of this cam being illustrated as a volute through five-sixths of the extent of the contour, the remaining sixth of the extent of the contour being an easy curve joining the extremities of the volute portion of the contour, and 37 a roller carried by arm 35 and engaging cam 36.

As the parts are shown in the drawings the roller 37 is engaged by that portion of the cam having the greatest radius and the fin ger 32 is in line with the innermost one of stop-rods 29, so that as the turret-slide moves to the left the finger comes in contact with the right end of that stop-rod. These conditions correspond with the active position of a certain one of the turret-tools. If now the turret be turned in clockwise direction onesixth of a turn to bring the second turret-tool to active position, a cam portion of lesser radius will come opposite roller 37 and permit spring 34: to rock shaft 31 and bring the extremity of finger 32 in line with the next to the innermost one of thestop-rods, and so for each angular position of the turret as the turret is set to bring any given tool to active position the finger 22 is automatically swung to position in line with the stop-rod appropriated to that particular tool.

Now assume the turret-slide to be to the right, with the finger awayfrom all stop-rods, and feeding to the left by the'power-feed locked into action by the latch and assume the parts adjusted as in the drawings, so that the finger 32 is in line with the innermost stop-rod, corresponding with the active posi* tion of the particular turret-tool to which that stop-rod is appropriated. As the turret-slide feeds automatically to the left the finger 32 finally strikes the end of the innermost stoprod. The turret-slide continues to advance under the influence of the power-feed, which is still connected, and as the stop-rod will not permit finger 32 or block 19 to advance further it follows that block '19 stands, while the turret advances, springplunger 21 yielding to permit this relative motion. This relative movement of block 19 on the turret-slide obviously Withdraws latch 24 from the shoulder of the latch-rod and permits the powerfeed to go out of action. This action of the parts \vill'arrest the automatic feeding operation and will obviously occur at a point in the advancing travel of the turret-slide dependent on the longitudinal adjustment which has been given to the stop-rod in question. This stop-rod is to have been adjusted in the bracket so as to cause the automatic ICC feed to be knocked out at a point dependent on where the particular turret-tool in operation is to cease its work. This knocking out of the automatic feed cannot be depended upon in the production of accurately-positioned shoulders upon work. Hence the given stop-rod should be adjusted to knock out the feed a trifle before the desired shoulderpoint is reached on the work. The turretslide having been thus automatically freed from the power-feed, it may now be further advanced by hand through the medium of capstan-wheel '7, spring-plunger 21 yielding still further during this operation. Finally lug 20 comes in rigid unyielding contact with the end of block 19, and the turret-slide can move no further. This forms the positive stop and determines the accurate position of the shoulder produced by the tool in action. The work of this given tool being done, the turret-slide is retracted and the turret turned, as usual, thus bringing a new tool to active position, and in doing this the finger automatically shifts to a position in line with the stop-rod appropriate to the new turret-tool, and so with any turret-tool. Several stoprods are to be adjusted longitudinally in bracket 27 in correspondence with the desired stopping-point for their respective turrettools. The shifting of the bracket along the lathe-bed shifts the entire group of stop-rods and provides for an extensive projection of the stop-rods from the bracket or for a very great difference in their degrees of projection. It will be seen that the stop-rods after adjustment are fixedly supported by the bed and that their effect is to first knock out the powerfeed and then provide an accurate rigid stopping for the turret.

Many of the details of construction particularly set forth herein are to be understood as merely exemplifying in characterand subject to modification at the hands of the skilled machine constructor seeking a realization of my present invention, the exemplification set forth being simply the best mode in which I at present contemplate the application of the principle of my invention.

In a pending application, Serial No. 8,432,

filed December 2, 1901, I set forth a turret stop mechanism in which a swinging finger carried by the turret-slide engages the end of stop-rods carried by the bed, as in thepresent case, the feed, however, being released by the endwise movement of the rods after being attacked by the finger, thus necessitating the sliding of the rods at time of feed release. In the present system I am able to effect the release of the feed without endwise motion of the stop-rods. What is set forth in said other application is not sought to be claimed herein.

I claim as my invention 1. In a turret-lathe, the combination, substantially as set forth, with a lathe-bed, a turret-slide, a turret, and releasable power mechanism for feeding the turret-slide along the bed, of a series of stop-rods supported by the bed, a finger carried by the turret-slide and movable into the line of any selected stoprod, a support for said finger mounted for longitudinal movement on the turret-slide, a rigid stop to limit the retreat of said support upon the turret-slide, a latch serving to-lock said power mechanism into action, and connections between said support and latch wherebythe retreating movement of said support toward said rigid stop serves to disengage said latch before the support reaches the rigid stop.

2. In a turret-lathe, the combination, substantially as set forth, with a lathe-bed, a turret-slide, a turret, and releasable power mechanism for feeding the turret-slide along the bed, of a series of independently-adjustable stop-rods supported by the bed, afinger carried by the turret-slide and movable into the line ofany selected stop-rod, a support for said finger mounted for longitudinal movement on the turret-slide, a rigid stop to limit the retreat of said support upon the turretslide, a latch'servin g to lock said power mechanism into action, and connections between said support and latch whereby the retreating movement of said support toward said rigid stop serves to disengage said latch before the support reaches the rigid stop.

3. In a turret-lathe, the combination, substantially as set forth, with a lathe-bed, a turret-slide, a turret, andreleasable power mechanism for feeding the turret-slide along the bed, of a bracket supported by the bed,a series of stop-rods supported by the bracket, a finger carried by the turret-slide and movable into the line of any selected stop-rod, asupport for said finger mounted for longitudinal movement on the turret-slide, a rigid stop to limit the retreat of said support upon theturret-slide, a latch serving to lock said power mechanism into action, and connections between said support and latch whereby the retreating movement of said support toward said rigid stop serves to disengage said latch before the support reaches the rigid stop.

4. In a turret-lathe, the combination, substantially as set forth, with a lathe-bed, a turret-slide, a turret, and releasable power mechanism for feeding the turret-slide along the bed, of a bracket supported by the 'bed and longitudinally adjustable along the same, a series of stop-rods supported by the bracket,

a finger carried by the turret-slide and movable into the line of any selected stop-rod, a

support for said finger mounted for longitustop to limit the retreat of said support upon the turret-slide, a latch serving to lock'said dinal movement on the turret-slide, a rigid" IIO power mechanism into action, andconnections between said support and latch whereby the retreating movement ofsaid'support toward said rigid stop serves to disengage said latch before the support reaches the rigid stop.

5. In a turret-lathe, the combination, substantially as set forth, with a lathe-bod, a turmechanism into action, and connections between said support and latch whereby the retreating movement of said support towardsaid rigid stop serves to disengage said latch before the support reaches the rigid stop.

6. In a turret-lathe, the combination, substantially as set forth, of a lathe-bod, a turretslide, a turret, means for advancing the turret toward the head end of the bed, a series of stop-rods supported by the bed between its ends and independent of the turret and presenting their ends in the direction of the tail end of the bed and held rigidly to resist endwise motion when their tail ends are pushed upon, and a finger pivoted to the turret-slide and adapted'to be swung into the line of any selected stop-rod and engage and be arrested by the tailward presenting end thereof.

7. In a turret-lathe, the combination, substantially as set forth, of a lathe-bed, a turretslide, a turret, means for advancing the turret toward the head end of the bed, a series of longitudinally-adjustable stop-rods supported by the bed between its ends and independent of the turret and presenting their ends in the direction of the tail end of the bed and held rigidly to resist endwise motion when their tail ends are pushed upon, and a finger pivoted to the turrets1ide and adapted to be swung into the line of any selected stoprod and engage and be arrested by the tailward presenting end thereof.

8. In a turret-lathe, the combination, substantially as set forth, of a bed, a turret-slide, a turret, disengageable power mechanism for feeding the turret-slide along the bed, a latch carried by the turret-slide and adapted to lock the power mechanism into action, a series of stop-rods fixedly supported by the bed, a transversely-movable finger carried by the turret-slide and adapted to be moved into the line of any selected stop-rod and mounted to have a motion of retreat upon the turretslide, a stop carried by the turret-slide and adapted to serve in limiting the retreating motion of the finger, and connections between said finger and latch to cause the retreating motion of the finger to release the latch.

9. In a turret-lathe, the combination, substantially as set forth, of a bed, a turretslide, a turret, disengageable power mechanism for feeding the turret-slide along the bed, a latch carried by the't'urret-slide and adapted to lock the power mechanism into action, a series of stop-rods fixedly supported by the bed, a finger carried by the turret-slide and mounted for longitudinal movement thereon and constructed to be moved into the line of any selected stop-rod and adapted to serve in limiting the retreating motion of the finger, connections between said finger and latch to cause the retreating motion of the finger to release the latch, and mechanism connecting the turret and the finger to cause the finger to move into line with the several stop-rods in accordance with the angular motion of the turret.

10. In a turret-lathe, the combination, substantially as set forth, with a lathe-bed, a turret-slid e, a turret, and releasable power mechanism for feeding the turretslide along the bed, of a series of stop-rods fixedly supported by the bed, a finger carried by the turretslide and movable into the line of any selected stop-rod and capable also of a retreating movement upon the turret-slide, mechanism connecting the turret and finger to move the finger into line with the several stop-rods in correspondence with the angular motion of the turret, a latch-rod mounted in the turret -and serving to engage and disengage the power mechanism, a latch carried by the turret-slide and engaging the latch-rod and holding it in position corresponding with the engaged position of the power mechanism, and connections between the latch and the finger to cause the latch to be released by the retreating motion of the finger.

11. In a turret-lathe, the combination, subtantially as set forth, of a lathe-bed, a turretslide, a turret, releasable power mechanism for feeding the turret-slide along the bed, a series of stop-rods fixedly supported by the bed, a block mounted to slide horizontally on the turret-slide, a stop carried by the turretslide to limit the rearward sliding of the block, a latch carried by the block and adapted to serve in retaining the power mechanism in action, a finger mounted on the block and adapted to move into line of any selected stop-rod, and mechanism connecting the turret and the finger to cause the finger to move into the line of the several stop-rods in correspondence with the angular movement of the turret.

BENGT M. \V. HANSON.

\Vitnesses:

W. M. Sronns, J. W. SEE. 

